trunk/public_html/meteor.js

// Set domain at highest level
var domainparts = document.domain.split(".");
document.domain = domainparts[domainparts.length-2]+"."+domainparts[domainparts.length-1];

Function.prototype.bind = function(obj) {
        var method = this,
        temp = function() {
                return method.apply(obj, arguments);
        };
        return temp;
}
Function.prototype.andThen=function(g) {
        var f=this;
        var a=this.arguments
        return function(args) {
                f(a);g(args);
        }
};

function Meteor(instID) {

        this.transferDoc = false;
        this.pingtimer = false;
        this.updatepollfreqtimer = false;
        this.lastrequest = 0;
        this.recvtimes = [];
        this.MHostId = false;
        this.callback_process = function() {};
        this.callback_reset = function() {};
        this.callback_eof = function() {};
        this.callback_changemode = function() {};
        this.callback_statuschanged = function() {};
        this.persist = 1;
        this.frameloadtimer = false;
        this.debugmode = false;
        this.subsurl = false;
        this.channels = {};
        this.channelcount = 0;
        this.streamreq = false;
        this.byteoffset = 0;

        // Documented public properties
        this.subdomain = "data";
        this.dynamicpageaddress = "push";
        this.smartpoll = 1;
        this.pollfreq = 2000;
        this.minpollfreq = 2000;
        this.mode = "stream";
        this.polltimeout = 30000;
        this.pingtimeout = 10000;
        this.maxmessages = 0;
        this.status = 0;

        /* Statuses:    0 = Uninitialised,
                                        1 = Loading stream,
                                        2 = Loading controller frame,
                                        3 = Controller frame timeout, retrying.
                                        4 = Controller frame loaded and ready
                                        5 = Receiving data
        */

        this.instID = (typeof(instID) != "undefined") ? instID : 0;
        this.MHostId = Math.floor(Math.random()*100000000)+""+this.instID;
}

Meteor.instances = new Array();

Meteor.create = function(instID) {
        if (!instID) instID = Meteor.instances.length;
        Meteor.instances[instID] = new Meteor(instID);
        return Meteor.instances[instID];
}

Meteor.register = function(ifr) {
        instid = new String(ifr.window.frameElement.id);
        instid = instid.replace(/.*_([0-9]*)$/, "$1");
        ifr.p = this.instances[instid].process.bind(this.instances[instid]);
        ifr.r = this.instances[instid].reset.bind(this.instances[instid]);
        ifr.eof = this.instances[instid].eof.bind(this.instances[instid]);
        ifr.get = this.instances[instid].get.bind(this.instances[instid]);
        ifr.increasepolldelay = this.instances[instid].increasepolldelay.bind(this.instances[instid]);
        clearTimeout(this.instances[instid].frameloadtimer);
        this.instances[instid].setstatus(4);
        if (this.debugmode) console.log("Frame registered");
}

Meteor.reset = function(ifr) {
        instid = new String(ifr.window.frameElement.id);
        instid = instid.replace(/.*_([0-9]*)$/, "$1");
        this.instances[instid].reset();
}

window.onunload = function() {
        for (var i in Meteor.instances) {
                if (Meteor.instances[i].transferDoc) delete Meteor.instances[i].transferDoc;
        }
}


Meteor.prototype.joinChannel = function(channelname, backtrack) {
        if (typeof(this.channels[channelname]) != "undefined") throw "Cannot join channel "+channelname+": already subscribed";
        this.channels[channelname] = {backtrack:backtrack, lastmsgreceived:0};
        if (this.debugmode) console.log("Joined channel "+channelname+", channel list follows");
        if (this.debugmode) console.log(this.channels);
        if (this.status != 0) this.start();
        this.channelcount++;
}

Meteor.prototype.leaveChannel = function(channelname) {
        if (typeof(this.channels[channelname]) == "undefined") throw "Cannot leave channel "+channelname+": not subscribed";
        delete this.channels[channelname];
        if (this.status != 0) this.start();
        this.channelcount--;
}

Meteor.prototype.start = function() {
        this.persist = (this.persist)?1:0;
        this.smartpoll = (this.smartpoll)?1:0;
        this.mode = (this.mode=="stream")?"stream":"poll";
        if (!this.subdomain || !this.channelcount) throw "Channel or Meteor subdomain host not specified";
        this.stop();
        var now = new Date();
        var t = now.getTime();
        this.setstatus(1);
        this.updateSubsUrl();
        if (this.mode=="stream") {
                if (document.all) {
                        this.createIframe(this.subsurl);
                } else {
                        this.createIframe("http://"+this.subdomain+"."+location.hostname+"/stream.html");
                }
                var f = this.pollmode.bind(this);
                clearTimeout(this.pingtimer);
                this.pingtimer = setTimeout(f, this.pingtimeout);

        } else {
                this.createIframe("http://"+this.subdomain+"."+location.hostname+"/poll.html?nc="+t);
                this.recvtimes[0] = t;
                if (this.updatepollfreqtimer) clearTimeout(this.updatepollfreqtimer);
                this.updatepollfreqtimer = setInterval(this.updatepollfreq.bind(this), 2500);
        }
        this.lastrequest = t;
}

Meteor.prototype.updateSubsUrl = function() {

        // If streaming or long polling, connection should persist
        this.persist = (this.mode == "stream" || (this.mode=='poll' && this.maxmessages > 0)) ? 1 : 0;
        var surl = "http://" + this.subdomain + "." + location.hostname + "/" + this.dynamicpageaddress + "?id=" + this.MHostId;
        if (this.persist && this.mode != "stream") surl += "&maxmessages=" + this.maxmessages;
        surl += "&persist="+this.persist;
        for (var c in this.channels) {
                surl += "&channel="+c;
                if (this.channels[c].lastmsgreceived > 0) {
                        surl += "&restartfrom="+(this.channels[c].lastmsgreceived+1);
                } else if (this.channels[c].backtrack > 0) {
                        surl += "&backtrack="+this.channels[c].backtrack;
                } else if (this.channels[c].backtrack < 0 || isNaN(this.channels[c].backtrack)) {
                        surl += "&restartfrom=";
                }
        }
        this.subsurl = surl;
}

Meteor.prototype.createIframe = function(url) {
        delete this.transferDoc;
        if (document.all) try { this.transferDoc = new ActiveXObject("htmlfile") } catch(ex) { this.transferDoc = null }
        if (document.all && this.transferDoc) {
                this.transferDoc.open();
                this.transferDoc.write("<html>");
                this.transferDoc.write("<script>document.domain=\""+(document.domain)+"\";</"+"script>");
                this.transferDoc.write("</html>");
                this.transferDoc.parentWindow.Meteor = Meteor;
                this.transferDoc.close();
                var ifrDiv = this.transferDoc.createElement("div");
                this.transferDoc.appendChild(ifrDiv);
                ifrDiv.innerHTML = "<iframe id=\"meteorframe_"+this.instID+"\" src=\""+url+"\" style=\"display: none;\"></iframe>";
        } else {
                var ifr = document.createElement("IFRAME");
                ifr.style.width = "10px";
                ifr.style.height = "10px";
                ifr.style.border = "none";
                ifr.style.position = "absolute";
                ifr.style.top = "-10px";
                ifr.style.marginTop = "-10px";
                ifr.style.zIndex = "-20";
                ifr.setAttribute("id", "meteorframe_"+this.instID);
                ifr.Meteor = Meteor;
                if (document.compatMode=='CSS1Compat') {
                        var innerifr = document.createElement("IFRAME");
                        innerifr.setAttribute("src", url);
                        innerifr.setAttribute("id", "meteorinnerframe_"+this.instID);
                        ifr.appendChild(innerifr);
                        document.body.appendChild(ifr);
                } else {
                        ifr.setAttribute("src", url);
                        document.body.appendChild(ifr);
                }
        }
        if (this.debugmode) console.log("Loading URL '"+url+"' into frame...");
        var f = this.frameloadtimeout.bind(this);
        this.frameloadtimer = setTimeout(f, 5000);
}

Meteor.prototype.stop = function() {
        if (typeof(this.transferDoc)=="object") {
                this.transferDoc = false;
        }
        if (document.getElementById("meteorframe_"+this.instID)) {
                document.getElementById("meteorframe_"+this.instID).src="about:blank";
                document.body.removeChild(document.getElementById("meteorframe_"+this.instID));
        }
        clearTimeout(this.pingtimer);
        clearTimeout(this.updatepollfreqtimer);
        clearTimeout(this.frameloadtimer);
        this.setstatus(0);
}

Meteor.prototype.pollmode = function() {
        if (this.debugmode) console.log("Ping timeout");
        this.mode="poll";
        this.start();
        this.callback_changemode("poll");
        this.lastpingtime = false;
}

Meteor.prototype.process = function(id, channel, data) {
        if (id == -1) {
                if (this.debugmode) console.log("Ping");
                this.ping();
        } else if (typeof(this.channels[channel]) != "undefined" && id > this.channels[channel].lastmsgreceived) {
                if (this.debugmode) console.log("Message "+id+" received on channel "+channel+" (last id on channel: "+this.channels[channel].lastmsgreceived+")\n"+data);
                this.callback_process(data);
                this.channels[channel].lastmsgreceived = id;
                if (this.mode=="poll") {
                        var now = new Date();
                        var t = now.getTime();
                        this.recvtimes[this.recvtimes.length] = t;
                        while (this.recvtimes.length > 5) this.recvtimes.shift();
                }
        }
        this.updateSubsUrl();
        this.setstatus(5);
}

Meteor.prototype.ping = function() {
        if (this.mode=="stream" && this.pingtimer) {
                clearTimeout(this.pingtimer);
                var f = this.pollmode.bind(this);
                this.pingtimer = setTimeout(f, this.pingtimeout);
                var now = new Date();
                this.lastpingtime = now.getTime();
        }
        this.setstatus(5);
}

Meteor.prototype.reset = function() {
        if (this.debugmode) console.log("Stream reset");
        var now = new Date();
        var t = now.getTime();
        var x = this.pollfreq - (t-this.lastrequest);
        if (x < 10) x = 10;
        this.ping();
        this.callback_reset();
        setTimeout(this.start.bind(this), x);
}

Meteor.prototype.eof = function() {
        this.callback_eof();
}

Meteor.prototype.get = function(varname) {
        eval("var a = this."+varname+";");
        if (typeof(a) == "undefined") throw "Cannot get value of "+varname;
        return a;
}

Meteor.prototype.increasepolldelay = function() {
        this.pollfreq *= 2;
}

Meteor.prototype.updatepollfreq = function() {
        if (this.smartpoll) {
                var now = new Date();
                var t = now.getTime();
                var avg = 0;
                for (var i=1; i<this.recvtimes.length; i++) {
                        var x = (this.recvtimes[i]-this.recvtimes[i-1]);
                        avg += (x>60000)? 60000 : x;
                }
                x = (t-this.recvtimes[this.recvtimes.length-1]);
                avg += (x>180000)? 180000 : x;
                avg /= this.recvtimes.length;
                if ((avg/3) < this.pollfreq && (avg/3) >= this.minpollfreq) this.pollfreq = Math.ceil(this.pollfreq*0.9);
                if ((avg/3) > this.pollfreq) this.pollfreq = Math.floor(this.pollfreq*1.05);
        }
}

Meteor.prototype.registerEventCallback = function(evt, funcRef) {
        if (evt=="process") {
                this.callback_process = (this.callback_process).andThen(funcRef);
        } else if (evt=="reset") {
                this.callback_reset = (this.callback_reset).andThen(funcRef);
        } else if (evt=="eof") {
                this.callback_eof = (this.callback_eof).andThen(funcRef);
        } else if (evt=="changemode") {
                this.callback_changemode = (this.callback_changemode).andThen(funcRef);
        } else if (evt=="changestatus") {
                this.callback_statuschanged = (this.callback_statuschanged).andThen(funcRef);
        }
}

Meteor.prototype.frameloadtimeout = function() {
        if (this.debugmode) console.log("Frame load timeout");
        if (this.frameloadtimer) clearTimeout(this.frameloadtimer);
        this.setstatus(3);
        setTimeout(this.start.bind(this), 5000);
}
Meteor.prototype.setstatus = function(newstatus) {
        if (this.status != newstatus) {
                this.status = newstatus;
                this.callback_statuschanged(newstatus);
        }
}


Meteor.createCookie = function(name,value,days) {
        if (days) {
                var date = new Date();
                date.setTime(date.getTime()+(days*24*60*60*1000));
                var expires = "; expires="+date.toGMTString();
        }
        else var expires = "";
        document.cookie = name+"="+value+expires+"; path=/";
}

Meteor.readCookie = function(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
}

Meteor.eraseCookie = function(name) {
        createCookie(name,"",-1);
}
1	// Set domain at highest level
2	var domainparts = document.domain.split(".");
3	document.domain = domainparts[domainparts.length-2]+"."+domainparts[domainparts.length-1];
4
5	Function.prototype.bind = function(obj) {
6	var method = this,
7	temp = function() {
8	return method.apply(obj, arguments);
9	};
10	return temp;
11	}
12	Function.prototype.andThen=function(g) {
13	var f=this;
14	var a=this.arguments
15	return function(args) {
16	f(a);g(args);
17	}
18	};
19
20	function Meteor(instID) {
21
22	this.transferDoc = false;
23	this.pingtimer = false;
24	this.updatepollfreqtimer = false;
25	this.lastrequest = 0;
26	this.recvtimes = [];
27	this.MHostId = false;
28	this.callback_process = function() {};
29	this.callback_reset = function() {};
30	this.callback_eof = function() {};
31	this.callback_changemode = function() {};
32	this.callback_statuschanged = function() {};
33	this.persist = 1;
34	this.frameloadtimer = false;
35	this.debugmode = false;
36	this.subsurl = false;
37	this.channels = {};
38	this.channelcount = 0;
39	this.streamreq = false;
40	this.byteoffset = 0;
41
42	// Documented public properties
43	this.subdomain = "data";
44	this.dynamicpageaddress = "push";
45	this.smartpoll = 1;
46	this.pollfreq = 2000;
47	this.minpollfreq = 2000;
48	this.mode = "stream";
49	this.polltimeout = 30000;
50	this.pingtimeout = 10000;
51	this.maxmessages = 0;
52	this.status = 0;
53
54	/* Statuses: 0 = Uninitialised,
55	1 = Loading stream,
56	2 = Loading controller frame,
57	3 = Controller frame timeout, retrying.
58	4 = Controller frame loaded and ready
59	5 = Receiving data
60	*/
61
62	this.instID = (typeof(instID) != "undefined") ? instID : 0;
63	this.MHostId = Math.floor(Math.random()*100000000)+""+this.instID;
64	}
65
66	Meteor.instances = new Array();
67
68	Meteor.create = function(instID) {
69	if (!instID) instID = Meteor.instances.length;
70	Meteor.instances[instID] = new Meteor(instID);
71	return Meteor.instances[instID];
72	}
73
74	Meteor.register = function(ifr) {
75	instid = new String(ifr.window.frameElement.id);
76	instid = instid.replace(/._([0-9])$/, "$1");
77	ifr.p = this.instances[instid].process.bind(this.instances[instid]);
78	ifr.r = this.instances[instid].reset.bind(this.instances[instid]);
79	ifr.eof = this.instances[instid].eof.bind(this.instances[instid]);
80	ifr.get = this.instances[instid].get.bind(this.instances[instid]);
81	ifr.increasepolldelay = this.instances[instid].increasepolldelay.bind(this.instances[instid]);
82	clearTimeout(this.instances[instid].frameloadtimer);
83	this.instances[instid].setstatus(4);
84	if (this.debugmode) console.log("Frame registered");
85	}
86
87	Meteor.reset = function(ifr) {
88	instid = new String(ifr.window.frameElement.id);
89	instid = instid.replace(/._([0-9])$/, "$1");
90	this.instances[instid].reset();
91	}
92
93	window.onunload = function() {
94	for (var i in Meteor.instances) {
95	if (Meteor.instances[i].transferDoc) delete Meteor.instances[i].transferDoc;
96	}
97	}
98
99
100	Meteor.prototype.joinChannel = function(channelname, backtrack) {
101	if (typeof(this.channels[channelname]) != "undefined") throw "Cannot join channel "+channelname+": already subscribed";
102	this.channels[channelname] = {backtrack:backtrack, lastmsgreceived:0};
103	if (this.debugmode) console.log("Joined channel "+channelname+", channel list follows");
104	if (this.debugmode) console.log(this.channels);
105	if (this.status != 0) this.start();
106	this.channelcount++;
107	}
108
109	Meteor.prototype.leaveChannel = function(channelname) {
110	if (typeof(this.channels[channelname]) == "undefined") throw "Cannot leave channel "+channelname+": not subscribed";
111	delete this.channels[channelname];
112	if (this.status != 0) this.start();
113	this.channelcount--;
114	}
115
116	Meteor.prototype.start = function() {
117	this.persist = (this.persist)?1:0;
118	this.smartpoll = (this.smartpoll)?1:0;
119	this.mode = (this.mode=="stream")?"stream":"poll";
120	if (!this.subdomain \|\| !this.channelcount) throw "Channel or Meteor subdomain host not specified";
121	this.stop();
122	var now = new Date();
123	var t = now.getTime();
124	this.setstatus(1);
125	this.updateSubsUrl();
126	if (this.mode=="stream") {
127	if (document.all) {
128	this.createIframe(this.subsurl);
129	} else {
130	this.createIframe("http://"+this.subdomain+"."+location.hostname+"/stream.html");
131	}
132	var f = this.pollmode.bind(this);
133	clearTimeout(this.pingtimer);
134	this.pingtimer = setTimeout(f, this.pingtimeout);
135
136	} else {
137	this.createIframe("http://"+this.subdomain+"."+location.hostname+"/poll.html?nc="+t);
138	this.recvtimes[0] = t;
139	if (this.updatepollfreqtimer) clearTimeout(this.updatepollfreqtimer);
140	this.updatepollfreqtimer = setInterval(this.updatepollfreq.bind(this), 2500);
141	}
142	this.lastrequest = t;
143	}
144
145	Meteor.prototype.updateSubsUrl = function() {
146
147	// If streaming or long polling, connection should persist
148	this.persist = (this.mode == "stream" \|\| (this.mode=='poll' && this.maxmessages > 0)) ? 1 : 0;
149	var surl = "http://" + this.subdomain + "." + location.hostname + "/" + this.dynamicpageaddress + "?id=" + this.MHostId;
150	if (this.persist && this.mode != "stream") surl += "&maxmessages=" + this.maxmessages;
151	surl += "&persist="+this.persist;
152	for (var c in this.channels) {
153	surl += "&channel="+c;
154	if (this.channels[c].lastmsgreceived > 0) {
155	surl += "&restartfrom="+(this.channels[c].lastmsgreceived+1);
156	} else if (this.channels[c].backtrack > 0) {
157	surl += "&backtrack="+this.channels[c].backtrack;
158	} else if (this.channels[c].backtrack < 0 \|\| isNaN(this.channels[c].backtrack)) {
159	surl += "&restartfrom=";
160	}
161	}
162	this.subsurl = surl;
163	}
164
165	Meteor.prototype.createIframe = function(url) {
166	delete this.transferDoc;
167	if (document.all) try { this.transferDoc = new ActiveXObject("htmlfile") } catch(ex) { this.transferDoc = null }
168	if (document.all && this.transferDoc) {
169	this.transferDoc.open();
170	this.transferDoc.write("<html>");
171	this.transferDoc.write("<script>document.domain=\""+(document.domain)+"\";</"+"script>");
172	this.transferDoc.write("</html>");
173	this.transferDoc.parentWindow.Meteor = Meteor;
174	this.transferDoc.close();
175	var ifrDiv = this.transferDoc.createElement("div");
176	this.transferDoc.appendChild(ifrDiv);
177	ifrDiv.innerHTML = "<iframe id=\"meteorframe_"+this.instID+"\" src=\""+url+"\" style=\"display: none;\"></iframe>";
178	} else {
179	var ifr = document.createElement("IFRAME");
180	ifr.style.width = "10px";
181	ifr.style.height = "10px";
182	ifr.style.border = "none";
183	ifr.style.position = "absolute";
184	ifr.style.top = "-10px";
185	ifr.style.marginTop = "-10px";
186	ifr.style.zIndex = "-20";
187	ifr.setAttribute("id", "meteorframe_"+this.instID);
188	ifr.Meteor = Meteor;
189	if (document.compatMode=='CSS1Compat') {
190	var innerifr = document.createElement("IFRAME");
191	innerifr.setAttribute("src", url);
192	innerifr.setAttribute("id", "meteorinnerframe_"+this.instID);
193	ifr.appendChild(innerifr);
194	document.body.appendChild(ifr);
195	} else {
196	ifr.setAttribute("src", url);
197	document.body.appendChild(ifr);
198	}
199	}
200	if (this.debugmode) console.log("Loading URL '"+url+"' into frame...");
201	var f = this.frameloadtimeout.bind(this);
202	this.frameloadtimer = setTimeout(f, 5000);
203	}
204
205	Meteor.prototype.stop = function() {
206	if (typeof(this.transferDoc)=="object") {
207	this.transferDoc = false;
208	}
209	if (document.getElementById("meteorframe_"+this.instID)) {
210	document.getElementById("meteorframe_"+this.instID).src="about:blank";
211	document.body.removeChild(document.getElementById("meteorframe_"+this.instID));
212	}
213	clearTimeout(this.pingtimer);
214	clearTimeout(this.updatepollfreqtimer);
215	clearTimeout(this.frameloadtimer);
216	this.setstatus(0);
217	}
218
219	Meteor.prototype.pollmode = function() {
220	if (this.debugmode) console.log("Ping timeout");
221	this.mode="poll";
222	this.start();
223	this.callback_changemode("poll");
224	this.lastpingtime = false;
225	}
226
227	Meteor.prototype.process = function(id, channel, data) {
228	if (id == -1) {
229	if (this.debugmode) console.log("Ping");
230	this.ping();
231	} else if (typeof(this.channels[channel]) != "undefined" && id > this.channels[channel].lastmsgreceived) {
232	if (this.debugmode) console.log("Message "+id+" received on channel "+channel+" (last id on channel: "+this.channels[channel].lastmsgreceived+")\n"+data);
233	this.callback_process(data);
234	this.channels[channel].lastmsgreceived = id;
235	if (this.mode=="poll") {
236	var now = new Date();
237	var t = now.getTime();
238	this.recvtimes[this.recvtimes.length] = t;
239	while (this.recvtimes.length > 5) this.recvtimes.shift();
240	}
241	}
242	this.updateSubsUrl();
243	this.setstatus(5);
244	}
245
246	Meteor.prototype.ping = function() {
247	if (this.mode=="stream" && this.pingtimer) {
248	clearTimeout(this.pingtimer);
249	var f = this.pollmode.bind(this);
250	this.pingtimer = setTimeout(f, this.pingtimeout);
251	var now = new Date();
252	this.lastpingtime = now.getTime();
253	}
254	this.setstatus(5);
255	}
256
257	Meteor.prototype.reset = function() {
258	if (this.debugmode) console.log("Stream reset");
259	var now = new Date();
260	var t = now.getTime();
261	var x = this.pollfreq - (t-this.lastrequest);
262	if (x < 10) x = 10;
263	this.ping();
264	this.callback_reset();
265	setTimeout(this.start.bind(this), x);
266	}
267
268	Meteor.prototype.eof = function() {
269	this.callback_eof();
270	}
271
272	Meteor.prototype.get = function(varname) {
273	eval("var a = this."+varname+";");
274	if (typeof(a) == "undefined") throw "Cannot get value of "+varname;
275	return a;
276	}
277
278	Meteor.prototype.increasepolldelay = function() {
279	this.pollfreq *= 2;
280	}
281
282	Meteor.prototype.updatepollfreq = function() {
283	if (this.smartpoll) {
284	var now = new Date();
285	var t = now.getTime();
286	var avg = 0;
287	for (var i=1; i<this.recvtimes.length; i++) {
288	var x = (this.recvtimes[i]-this.recvtimes[i-1]);
289	avg += (x>60000)? 60000 : x;
290	}
291	x = (t-this.recvtimes[this.recvtimes.length-1]);
292	avg += (x>180000)? 180000 : x;
293	avg /= this.recvtimes.length;
294	if ((avg/3) < this.pollfreq && (avg/3) >= this.minpollfreq) this.pollfreq = Math.ceil(this.pollfreq*0.9);
295	if ((avg/3) > this.pollfreq) this.pollfreq = Math.floor(this.pollfreq*1.05);
296	}
297	}
298
299	Meteor.prototype.registerEventCallback = function(evt, funcRef) {
300	if (evt=="process") {
301	this.callback_process = (this.callback_process).andThen(funcRef);
302	} else if (evt=="reset") {
303	this.callback_reset = (this.callback_reset).andThen(funcRef);
304	} else if (evt=="eof") {
305	this.callback_eof = (this.callback_eof).andThen(funcRef);
306	} else if (evt=="changemode") {
307	this.callback_changemode = (this.callback_changemode).andThen(funcRef);
308	} else if (evt=="changestatus") {
309	this.callback_statuschanged = (this.callback_statuschanged).andThen(funcRef);
310	}
311	}
312
313	Meteor.prototype.frameloadtimeout = function() {
314	if (this.debugmode) console.log("Frame load timeout");
315	if (this.frameloadtimer) clearTimeout(this.frameloadtimer);
316	this.setstatus(3);
317	setTimeout(this.start.bind(this), 5000);
318	}
319	Meteor.prototype.setstatus = function(newstatus) {
320	if (this.status != newstatus) {
321	this.status = newstatus;
322	this.callback_statuschanged(newstatus);
323	}
324	}
325
326
327	Meteor.createCookie = function(name,value,days) {
328	if (days) {
329	var date = new Date();
330	date.setTime(date.getTime()+(days2460601000));
331	var expires = "; expires="+date.toGMTString();
332	}
333	else var expires = "";
334	document.cookie = name+"="+value+expires+"; path=/";
335	}
336
337	Meteor.readCookie = function(name) {
338	var nameEQ = name + "=";
339	var ca = document.cookie.split(';');
340	for(var i=0;i < ca.length;i++) {
341	var c = ca[i];
342	while (c.charAt(0)==' ') c = c.substring(1,c.length);
343	if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
344	}
345	return null;
346	}
347
348	Meteor.eraseCookie = function(name) {
349	createCookie(name,"",-1);
350	}